The P220 R is the railed variant of the standard P220, adding an accessory rail to the dustcover for mounting lights and lasers. The R designation across SIG pistols consistently denotes the addition of a Picatinny or proprietary accessory rail to the frame. It is the baseline railed P220 and the starting point for most P220 Elite and Legion configurations. Standard production alongside the base P220. Type: Semi-Auto Pistol Action: DA/SA Caliber: .45 ACP Capacity: 8 Year introduced: 2005, Germany/USA Weight: 30.4 oz Overall length: 7.7" Status: Active Intended use: duty, home_defense